This is one of the old porcelain cord pendants with a Mazda bulb. The card and pin are from the utility company with their "Ready Kilowatt" mascot that was popular in the 1960's.
Somewhere, in my physical archives, I have a Reddy Kilowatt pin that was awarded to me as part of going to the National 4-H Conference in Chicago, 1960 I think. My nomination and attendance was based on my 4-H activities in the "Electric Project".
Got a code book from my Dad too - buried in the same physical archive, along with the complete set of Audel's.